122687928 has 96 divisors (see below), whose sum is σ = 366453360. Its totient is φ = 36771840.

The previous prime is 122687927. The next prime is 122687993. The reversal of 122687928 is 829786221.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122687923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76026 + ... + 77622.

Almost surely, 2^122687928 is an apocalyptic number.

122687928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122687928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183226680).

122687928 is an abundant number, since it is smaller than the sum of its proper divisors (243765432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122687928 is a wasteful number, since it uses less digits than its factorization.

122687928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717 (or 1710 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 122687928 is about 11076.4582787099. The cubic root of 122687928 is about 496.8980327284.

The spelling of 122687928 in words is "one hundred twenty-two million, six hundred eighty-seven thousand, nine hundred twenty-eight".